

import 'package:flutter/material.dart';
class AnimatedListPage extends StatefulWidget {
  const AnimatedListPage({super.key});
  @override
  State<AnimatedListPage> createState() => _AnimatedListPageState();
}
class _AnimatedListPageState extends State<AnimatedListPage> {
  final globalKey = GlobalKey<AnimatedListState>();
  List<String> list = ["第一条数据","第二条数据"];
  @override
  void initState() {
    super.initState();
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      floatingActionButton: FloatingActionButton(
        onPressed: (){
          list.add("这是一个数据");
          globalKey.currentState!.insertItem(list.length - 1);
        },
        child: const Icon(Icons.add),
      ),
      appBar: AppBar(
        title: const Text("AppBar组件"),
      ),
      body: AnimatedList(
          key: globalKey,
          initialItemCount: list.length,
          itemBuilder: (context, index, animation) {
         //   return FadeTransition(
            //opacity: animation,
            return ScaleTransition(
              scale: animation,
              child: ListTile(
                  title: Text(list[index]),
                  trailing: Icon(Icons.delete)
              ),
            );
          }),
    );
  }
}